Springmvc中的处理器、拦截器、过滤器的执行时机

~码铃薯~ / 2024-08-30 / 原文

Springmvc中的处理器、拦截器、过滤器的执行时机

测试案例：

public class MyFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("--->> MyFilter.init");
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("--->> MyFilter.doFilter");
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        System.out.println("--->> MyFilter.destroy");
    }
}

public class MyInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("--->> MyInterceptor preHandle");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("--->> MyInterceptor postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("--->> MyInterceptor afterCompletion");
    }
}

public class MyListener implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        System.out.println("--->> MyListener.contextInitialized");
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        System.out.println("--->> MyListener.contextDestroyed");
    }
}